John Carter (2012)

John Carter is a war-weary, former military captain who's inexplicably transported to the mysterious and exotic planet of Barsoom (Mars) and reluctantly becomes embroiled in an epic conflict. It's a world on the brink of collapse, and Carter rediscovers his humanity when he realizes the survival of Barsoom and its people rests in his hands. based on novel or book, planet mars, medallion, space travel, princess, alien, steampunk, martian, escape, alien race, superhuman strength, martian civilization, sword and planet, 19th century